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Revenue from Contracts with Customers - Schedule of Sales Reserves and Allowances (Detail) $ in Millions | 6 Months Ended
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Jun. 30, 2018 USD ($)
Revenue Recognition [Line Items] |
Sales reserves and allowances, beginning balance | $ 8,077
Provisions related to sales made in current year period | 10,168
Provisions related to sales made in prior periods | (51)
Credits and payments | (10,850)
Translation differences | (34)
Sales reserves and allowances, ending balance | 7,310
Reserves Included in Accounts Receivable, Net [Member] |
Revenue Recognition [Line Items] |
Sales reserves and allowances, beginning balance | 196
Provisions related to sales made in current year period | 263
Provisions related to sales made in prior periods | 2
Credits and payments | (288)
Translation differences | (1)
Sales reserves and allowances, ending balance | 172
Rebates [Member] |
Revenue Recognition [Line Items] |
Sales reserves and allowances, beginning balance | 3,077
Provisions related to sales made in current year period | 3,496
Provisions related to sales made in prior periods | (28)
Credits and payments | (3,556)
Translation differences | (17)
Sales reserves and allowances, ending balance | 2,972
Medicaid and Other Governmental Allowances [Member] |
Revenue Recognition [Line Items] |
Sales reserves and allowances, beginning balance | 1,908
Provisions related to sales made in current year period | 701
Provisions related to sales made in prior periods | (21)
Credits and payments | (779)
Translation differences | (3)
Sales reserves and allowances, ending balance | 1,806
Chargebacks [Member] |
Revenue Recognition [Line Items] |
Sales reserves and allowances, beginning balance | 1,849
Provisions related to sales made in current year period | 5,327
Provisions related to sales made in prior periods | (1)
Credits and payments | (5,765)
Translation differences | (2)
Sales reserves and allowances, ending balance | 1,408
Returns [Member] |
Revenue Recognition [Line Items] |
Sales reserves and allowances, beginning balance | 780
Provisions related to sales made in current year period | 171
Provisions related to sales made in prior periods | 17
Credits and payments | (211)
Translation differences | (3)
Sales reserves and allowances, ending balance | 754
Other [Member] |
Revenue Recognition [Line Items] |
Sales reserves and allowances, beginning balance | 267
Provisions related to sales made in current year period | 210
Provisions related to sales made in prior periods | (20)
Credits and payments | (251)
Translation differences | (8)
Sales reserves and allowances, ending balance | 198
Total Reserves Included in Sales Reserves and Allowances [Member] |
Revenue Recognition [Line Items] |
Sales reserves and allowances, beginning balance | 7,881
Provisions related to sales made in current year period | 9,905
Provisions related to sales made in prior periods | (53)
Credits and payments | (10,562)
Translation differences | (33)
Sales reserves and allowances, ending balance | $ 7,138

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